CN212807918U

CN212807918U - Loading device for pseudo-static test

Info

Publication number: CN212807918U
Application number: CN202021797057.6U
Authority: CN
Inventors: 鲁锦华; 丁明波
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-03-26
Anticipated expiration: 2030-08-25

Abstract

The utility model relates to a structure safety test technical field especially relates to a loading device for pseudo-static test, including the ground foot that two symmetries set up and the fixed plate of using a set of third fixing bolt to fix on the counter-force wall, all be equipped with the finish rolling screw rod on every fixed plate, the cooperation is connected with the channel-section steel clamp plate on the finish rolling screw rod, is equipped with the object that awaits measuring at channel-section steel clamp plate downside, and the one end of horizontal actuator piston rod is fixed with first locating plate, is equipped with the second locating plate in first locating plate one side, is equipped with the sensor protective housing between first locating plate and second locating plate. The utility model discloses articulated slab and the U-shaped board that sets up, the effectual reciprocal impulsive force of this kind of having absorbed has effectively prevented not hard up of bolt, has increased the accuracy of experimental data, and control level actuator shrink alright change with the second pressure sensor to in the sensor protective housing, save a large amount of dismantlements.

Description

Loading device for pseudo-static test

Technical Field

The utility model relates to a structural safety tests technical field, especially relates to a loading device for pseudo-static test.

Background

The pseudo-static test is also called a low-cycle repeated load test, and refers to a static test for applying repeated reciprocating circulation action on a structure or a structural member, and is a process for repeatedly loading and unloading the structure or the structural member in positive and negative directions, so as to simulate the stress characteristics and deformation characteristics of the structure in the reciprocating vibration during earthquake. This method uses a static method to determine the effect of the structure when it vibrates, and is therefore called a pseudo-static test, or pseudo-static test.

The structure pseudo-static test is one of the most widely applied methods for researching the stress and deformation performance of the structure or structural member at present. It adopts a certain load control or displacement control to make low-cycle repeated loading method on the test piece, so that said test piece can be tested from beginning to be stressed to be damaged, so that it can obtain the non-elastic load-deformation property of structure or structural member, so that it is also called restoring force property test.

At present pseudo-static test device when experimental, because will await measuring the object and all use the bolt etc. to fix on the level subaerial, after the bolt is exerted many times reciprocal circulation effect, can make the bolt take place not hard up the condition, increase the error of experiment, and when experimental, often need carry out real-time supervision to the pressure that awaits measuring the object and receive, pressure is monitored to general use pressure sensor, but pressure sensor is under long-time pressure, the tired condition of part often can take place, if not in time change, can cause pressure sensor's damage, but present pressure sensor generally uses corresponding fixing device (screw, bolt) to fix, still need dismantle the part when changing, waste time and energy.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a loading device for a pseudo-static test, which aims to solve the problem that the bolt is loosened after the bolt is subjected to a plurality of reciprocating circulation actions in the background technology and increase the error of the test; the pressure sensor is not easy to replace.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a loading device for pseudo-static test, the fixed plate on the counterforce wall is fixed with a set of third fixing bolt including the grounding foot that two symmetries set up, all be equipped with the finish rolling screw rod on every fixed plate, the cooperation is connected with the channel-section steel clamp plate on the finish rolling screw rod, be equipped with the examination object of awaiting measuring at channel-section steel clamp plate downside, use a set of bolt fastening to have the second mounting panel in fixed plate one side, use the one end that first articulated elements articulated have horizontal actuator in second mounting panel one side, the one end of horizontal actuator piston rod is fixed with first locating plate, be equipped with the second locating plate in first locating plate one side, be equipped with the sensor protective housing between first locating plate and second.

Preferably, both opposite sides on the sensor protective housing all are equipped with the recess, first locating plate and second locating plate set up respectively in corresponding recess, first locating plate and second locating plate all with corresponding recess sliding connection, be equipped with the mounting hole on the sensor protective housing, the both ends of mounting hole are in respectively in two recesses, the mounting hole sets up with the recess is coaxial, install second pressure sensor in the mounting hole, second pressure sensor and mounting hole sliding connection, second pressure sensor's length is greater than the length of mounting hole, install the circuit through-hole on the sensor protective housing, inside circuit through-hole intercommunication sensor protective housing and the mounting hole, be equipped with the toper mounting groove on the mounting hole inner wall, circuit through-hole and the coaxial setting of toper mounting groove.

Preferably, the ground pin is fixed to the reaction ground using two first fixing screws disposed to face each other, and the first mounting plate is fixed to the upper side of the ground pin.

Preferably, the first mounting plate is fixed by a group of bolts, a hinged plate is fixedly connected to the first mounting plate, a U-shaped plate is sleeved on the hinged plate, the hinged plate is hinged to the U-shaped plate by a corresponding pin shaft, a first locking nut is inserted and fixed to the U-shaped plate, and a finish rolling screw rod is connected to the inside of the first locking nut in a matched mode.

Preferably, two finish rolling screw rod top cooperation is connected with the channel-section steel clamp plate, and two finish rolling screw rods run through the channel-section steel clamp plate and rather than sliding connection, and equal threaded connection has second lock nut on every finish rolling screw rod, and second lock nut sets up in channel-section steel clamp plate top, is equipped with first pressure sensor between second lock nut and channel-section steel clamp plate, and first pressure sensor cup joints on the finish rolling screw rod.

Preferably, one side of the second positioning plate is hinged to a third mounting plate through a second hinge, the third mounting plate is fixed to an object to be tested through a group of bolts, and the object to be tested is fixed to a counter-force terrace through a group of second fixing screws.

The utility model discloses possess following beneficial effect at least:

the first mounting plate of the loading device for the pseudo-static test is fixed by a group of bolts, a hinged plate is fixedly connected to the first mounting plate, a U-shaped plate is sleeved on the hinged plate, the hinged plate is hinged to the U-shaped plate by corresponding hinge pins, a reserved groove is formed in the upper side of the hinged plate and is opposite to a finish rolling screw, the width of the reserved groove is larger than the diameter of the finish rolling screw, an object to be tested can move along the direction of a force of a horizontal actuator, and then the finish rolling screw is driven to shake, the shaking generally causes loosening of the bolts for fixing the first mounting plate, but the hinged plate and the U-shaped plate effectively absorb the reciprocating impulsive force, so that loosening of the bolts is effectively prevented, and accuracy of experimental data is improved;

relative both sides on this loading device for pseudo-static test's the sensor protective housing all are equipped with the recess, first locating plate and second locating plate set up respectively in corresponding recess, be equipped with the mounting hole on the sensor protective housing, install second pressure sensor in the mounting hole, second pressure sensor and mounting hole sliding connection, install the circuit through-hole on the sensor protective housing, be equipped with the toper mounting groove on the mounting hole inner wall, circuit through-hole and toper mounting groove intercommunication, after detecting the completion, can control horizontal actuator shrink, cause first locating plate and second locating plate and sensor protective housing separately, alright change with the second pressure sensor to in the sensor protective housing, save a large amount of dismantlement work, the volume experiment number of times in the unit interval has been increased.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is another perspective view of the present invention;

fig. 3 is a schematic view of the internal structure of the sensor protection case according to the present invention;

fig. 4 is a schematic diagram of the position relationship between the preformed groove and the U-shaped plate of the present invention.

In the figure: 1. a ground pin; 2. a first fixing screw; 3. a first mounting plate; 4. a hinge plate; 41. reserving a groove; 5. a U-shaped plate; 6. finely rolling the screw; 7. pressing plates for channel steel; 8. a first pressure sensor; 9. a second lock nut; 10. a first lock nut; 11. an object to be tested; 12. a second fixing screw; 13. a third mounting plate; 15. a second hinge member; 16. a second positioning plate; 17. a first positioning plate; 18. a sensor protective housing; 181. a groove; 182. a line via hole; 183. a tapered mounting groove; 184. mounting holes; 185. a second pressure sensor; 19. a horizontal actuator; 21. a fixing plate; 22. a second mounting plate; 23. a first hinge member; 24. and a third fixing bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-4, a loading device for a pseudo-static test comprises two symmetrically arranged grounding pins 1 and fixing plates 21 fixed on a reaction wall by using a set of third fixing bolts 24, each fixing plate 21 is provided with a finish rolling screw 6, the finish rolling screw 6 is connected with a channel steel pressing plate 7 in a matching manner, an object to be tested 11 is arranged on the lower side of the channel steel pressing plate 7, one side of each fixing plate 21 is fixed with a second mounting plate 22 by using a set of bolts, one side of each second mounting plate 22 is hinged with one end of a horizontal actuator 19 by using a first hinge 23, one end of a piston rod of the horizontal actuator 19 is fixed with a first positioning plate 17, one side of each first positioning plate 17 is provided with a second positioning plate 16, and a sensor protective shell 18 is arranged between each first positioning plate 17 and the second positioning plate.

Preferably, the two opposite sides of the sensor protective shell 18 are provided with grooves 181, the first positioning plate 17 and the second positioning plate 16 are respectively arranged in the corresponding grooves 181, the first positioning plate 17 and the second positioning plate 16 are both connected with the corresponding grooves 181 in a sliding manner, the sensor protective shell 18 is provided with a mounting hole 184, two ends of the mounting hole 184 are respectively located in the two grooves 181, the mounting hole 184 and the grooves 181 are coaxially arranged, the mounting hole 184 is internally provided with a second pressure sensor 185, the second pressure sensor 185 is connected with the mounting hole 184 in a sliding manner, the length of the second pressure sensor 185 is greater than that of the mounting hole 184, the sensor protective shell 18 is provided with a circuit through hole 182, the circuit through hole 182 is communicated with the insides of the sensor protective shell 18 and the mounting hole 184, the inner wall of the mounting hole 184 is provided with a tapered mounting groove 183, and the circuit through hole 182 and the tapered.

Preferably, the ground pin 1 is fixed to the reaction ground by using two first fixing screws 2 provided to face each other, and the first mounting plate 3 is fixed to the upper side of the ground pin 1.

Preferably, the first mounting plate 3 is fixed by a group of bolts, a hinged plate 4 is fixedly connected to the first mounting plate 3, a U-shaped plate 5 is sleeved on the hinged plate 4, the hinged plate 4 is hinged to the U-shaped plate 5 by a corresponding pin shaft, a first locking nut 10 is inserted and fixed on the U-shaped plate 5, and a finish rolling screw 6 is fittingly connected in the first locking nut 10.

Preferably, two finish rolling screw rods 6 top cooperation are connected with channel-section steel clamp plate 7, and two finish rolling screw rods 6 run through channel-section steel clamp plate 7 and rather than sliding connection, and equal threaded connection has second lock nut 9 on every finish rolling screw rod 6, and second lock nut 9 sets up in channel-section steel clamp plate 7 top, is equipped with first pressure sensor 8 between second lock nut 9 and channel-section steel clamp plate 7, and first pressure sensor 8 cup joints on finish rolling screw rod 6.

Preferably, the second positioning plate 16 is hinged to a third mounting plate 13 by a second hinge 15, the third mounting plate 13 is fixed to the object to be tested 11 by a set of bolts, and the object to be tested 11 is fixed to the reaction terrace by a set of second fixing screws 12.

Preferably, a preformed groove 41 is formed in the upper side of the hinged plate 4, the preformed groove 41 is arranged opposite to the finish rolling screw 6, and the width of the preformed groove 41 is larger than the diameter of the finish rolling screw 6.

The working principle is as follows: firstly, an object to be detected is arranged on a counterforce terrace, all parts are completely arranged, then the fastening condition of screws is checked, after all preparations are finished, the horizontal actuator 19 is used for reciprocating motion, so that the stress characteristics and deformation characteristics of the structure in reciprocating vibration during earthquake are simulated, during detection, the object to be tested 11 moves along the direction of the force of the horizontal actuator 19, so as to drive the finish rolling screw 6 on the channel steel pressing plate 7 to shake, the shaking can generally lead to the loosening of the bolt for fixing the finish rolling screw 6, but the hinged plate 4 and the U-shaped plate 5 which are hinged are added in the utility model, the reciprocating impact force is effectively absorbed, the loosening of the bolt is effectively prevented, the accuracy of experimental data is increased, after the detection is completed, the horizontal actuator 19 can be controlled to contract, so that the second pressure sensor 185 in the sensor protection shell 18 can be conveniently replaced.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A loading device for a pseudo-static test comprises two symmetrically arranged grounding pins (1) and a fixing plate (21) fixed on a counterforce wall by using a group of third fixing bolts (24), it is characterized in that each fixing plate (21) is provided with a finish rolling screw (6), a channel steel pressing plate (7) is matched and connected on the finish rolling screw rod (6), an object to be tested (11) is arranged at the lower side of the channel steel pressing plate (7), a second mounting plate (22) is fixed on one side of the fixing plate (21) by using a group of bolts, one end of a horizontal actuator (19) is hinged on one side of the second mounting plate (22) by using a first hinge part (23), one end of a piston rod of the horizontal actuator (19) is fixed with a first positioning plate (17), a second positioning plate (16) is arranged on one side of the first positioning plate (17), and a sensor protection shell (18) is arranged between the first positioning plate (17) and the second positioning plate (16).

2. The loading device for the pseudo-static test according to claim 1, wherein two opposite sides of the sensor protective shell (18) are respectively provided with a groove (181), the first positioning plate (17) and the second positioning plate (16) are respectively arranged in the corresponding grooves (181), the first positioning plate (17) and the second positioning plate (16) are respectively connected with the corresponding grooves (181) in a sliding manner, the sensor protective shell (18) is provided with a mounting hole (184), two ends of the mounting hole (184) are respectively arranged in the two grooves (181), the mounting hole (184) and the grooves (181) are coaxially arranged, the mounting hole (184) is internally provided with a second pressure sensor (185), the second pressure sensor (185) is connected with the mounting hole (184) in a sliding manner, the length of the second pressure sensor (185) is greater than that of the mounting hole (184), the sensor protective shell (18) is provided with a line through hole (182), the circuit through hole (182) is communicated with the interior of the sensor protection shell (18) and the mounting hole (184), a conical mounting groove (183) is formed in the inner wall of the mounting hole (184), and the circuit through hole (182) and the conical mounting groove (183) are coaxially arranged.

3. A loading device for a pseudo-static test according to claim 1, characterized in that the grounding pin (1) is fixed on the counter-force terrace by two oppositely arranged first fixing screws (2), and a first mounting plate (3) is fixed on the upper side of the grounding pin (1).

4. A loading device for a pseudo-static test according to claim 3, wherein the first mounting plate (3) is fixed by a group of bolts, a hinged plate (4) is fixedly connected to the first mounting plate (3), a U-shaped plate (5) is sleeved on the hinged plate (4), the hinged plate (4) is hinged to the U-shaped plate (5) by corresponding pin shafts, a first locking nut (10) is inserted and fixed to the U-shaped plate (5), and a finish rolling screw (6) is connected in the first locking nut (10) in a matched manner.

5. A loading device for a pseudo-static test according to claim 4, characterized in that a channel steel pressing plate (7) is fittingly connected above the two finish rolling screws (6), the two finish rolling screws (6) penetrate through the channel steel pressing plate (7) and are slidably connected with the channel steel pressing plate, a second locking nut (9) is in threaded connection with each finish rolling screw (6), the second locking nut (9) is arranged above the channel steel pressing plate (7), a first pressure sensor (8) is arranged between the second locking nut (9) and the channel steel pressing plate (7), and the first pressure sensor (8) is sleeved on the finish rolling screws (6).

6. A loading device for a pseudo-static test according to claim 1, wherein one side of the second positioning plate (16) is hinged to a third mounting plate (13) by a second hinge (15), the third mounting plate (13) is fixed on the object to be tested (11) by a group of bolts, and the object to be tested (11) is fixed on the counterforce terrace by a group of second fixing screws (12).

7. A loading device for a pseudo-static test according to claim 4, characterized in that the upper side of the hinged plate (4) is provided with a reserved groove (41), the reserved groove (41) is arranged opposite to the finish rolling screw (6), and the width of the reserved groove (41) is larger than the diameter of the finish rolling screw (6).